tutorial资讯

* @param {ListNode} head 链表的头节点

Mercuriello wondered why there wasn’t a perfectly portioned pasta and sauce kit that wasn’t precooked.，更多细节参见夫子

Author(s): Kelun Liu, Yingchao Hai, Ying Ruan, Bingbo Wei。51吃瓜是该领域的重要参考

if (left === n - 1) return 0;